Results 71 to 80 of about 278,731 (238)

Synthesis and application of alginate@CuFe2O4 polymeric spheres in 17‐β‐estradiol adsorption processes in Amazonian rivers

open access: yesPolymer International, EarlyView.
Magnetic alginate beads, functionalized with copper ferrite, effectively remove 17‐β‐estradiol from Amazonian water, exhibiting optimized 238.65 μg g−1 capacity, fast 40 min kinetics, easy recovery, and successful remediation. Abstract The presence of endocrine‐disrupting compounds, such as 17‐β‐estradiol, in aquatic ecosystems poses a significant ...
Dante S Silva   +10 more
wiley   +1 more source

Pleistocene volcaniclastic units from North-Eastern Sicily (Italy): New evidence for calc-alkaline explosive volcanism in the Southern Tyrrhenian Sea

open access: yes, 2016
: A well-preserved volcaniclastic sequence crops out in Pleistocene marine sediments along the Tyrrhenian coastline of the Calabrian-Peloritani arc (Sicily, Italy), testifying the occurrence of Lower-Middle Pleistocene volcanic activity in ...
DI BELLA, Marcella   +9 more
core  

Evidence for Miocene subduction beneath the Alboran Sea (Western Mediterranean) from 40Ar/39Ar age dating and the geochemistry of volcanic rocks from holes 977A and 978A [PDF]

open access: yes, 1999
Volcanic pebbles in gravels from Sites 977 and 978 in the Alboran Sea (western Mediterranean) were dated (using the 40Ar/ 39Ar single-crystal laser technique) and analyzed for their major- and trace-element compositions (determined by X-ray ...
Hoernle, Kaj   +4 more
core   +1 more source

Agenda comentada

open access: yes, 2011
CALC ...
CALC, ALADI
core   +1 more source

Petrogenesis of low Silica Adakitic domes of Sahl (South of Shahrood, southeast of Semnan Province) [PDF]

open access: yesپترولوژی, 2016
Sahl area, in the south of Shahrood, is a part of the northern portion of the Central Iran Structural Zone. The area is dominated by a thick sequence of the Paleocene to the middle Eocene volcanic and volcano-sedimentary rocks.
Fazilat Yousefi   +4 more
doaj  

The Crystal Structures of High‐ and Low‐Temperature Silver Pyrophosphate: Structural Instability and Its Consequences

open access: yesZeitschrift für anorganische und allgemeine Chemie, EarlyView.
The crystal structures of the high‐temperature and low‐temperature phases of silver pyrophosphate are reported. The structural results are complemented by thermal analysis, vibrational and 31P‐MAS‐NMR spectroscopy studies, and density functional theory calculations.
Matthias Weil   +8 more
wiley   +1 more source

REE distribution in Upper Cretaceous calc-alkaline and shoshonitic volcanic rocks from Eastern Srednogorie (Bulgaria)

open access: yes, 1979
La, Ce, Nd, Sm, Eu, Gd, Tb, Yb, Lu, Cr and Sc contents have been determined by instrumental neutron activation analyses (INAA) in high-K calc-alkaline and shoshonitic volcanic rocks from the Upper Cretaceous volcanic belt of Eastern Srednogorie (Bulgaria)
POLI, Giampiero   +2 more
core   +1 more source

Solvent‐free thallium(I) tetrakis[3,5‐bis(trifluoromethyl)phenyl]borate: crystal structure, supramolecular interactions and anisotropic thermal expansion

open access: yesActa Crystallographica Section C, EarlyView.
The solvent‐free structure of the thallium(I) salt of the weakly coordinating anion tetrakis[3,5‐bis(trifluoromethyl)phenyl]borate, Tl[BC32H12F24], exhibits short Tl…F contacts and a supramolecular architecture governed by C—H…F hydrogen bonds and weak F…F and C—F…π interactions.
Johannes Stephan   +4 more
wiley   +1 more source

Fluid Inclusions at the Plavica Au-Ag-Cu Telescoped Porphyry–Epithermal System, Former Yugoslavian Republic of Macedonia (FYROM)

open access: yesGeosciences, 2019
The Plavica Au-Ag-Cu porphyry and high sulfidation (HS) epithermal deposit is located at the Kratovo⁻Zlatovo volcanic field in Eastern Former Yugoslavian Republic of Macedonia. In this study, new fluid inclusions data provide additional evidence of
Vasilios Melfos   +3 more
doaj   +1 more source

Processes and Patterns of Dolomite Precipitation in Aptian Pre‐Salt Deposits of Santos Basin, Brazil

open access: yesJournal of Petroleum Geology, EarlyView.
ABSTRACT The Aptian pre‐salt lacustrine carbonates represent the most significant oil exploration target along the South Atlantic margin. Dolomitization of the Santos Basin Barra Velha Formation (BVF) is critical for reservoir quality, yet its origin, patterns, and evolution remain poorly understood.
J. T. F. Oste   +3 more
wiley   +1 more source

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